Three-color intaglio rotary printing press



g 2 c. SCHUNEMANN THREE-COLOR INTAGLIO RQTARY PRINTING PRESS Filed July 13. 1926 2 Sheets-Sheet 1 Patented Aug. 2, 1927.

UNITED STATES PATENT OFFICE.

CARL SCHUNEIANN, F BREMEN, GERMANY.

THREE-COLOR INTAGLIO ROTARY PRINTING PRESS.

Application filed July 13, 1926, Serial No. 122,079, and in Germany April 15, 1926.

Small size intaglio rotary printing presses have become known in which the several sheets are printed by means of an intaglio copper cylinder, when the sheets are being conducted over an impression cylinder. 1n-

taglio rotary printing presses for multi-color printing have become known also.

This invention has for its object to create a three-color intaglio rotary printing press in which, after each printing, a new laying on takes place in order to obtain an absolutely accurate registering. The improved machine is constructed in such a manner that perfect drying is ensured between the several printing actions.

The invention consists in series connecting the intaglio printing cylinders which co-op' crate each with a separate impression cylinder so that, after every printing. the sheet is released by the grippers after having passed over the conveying drum. the sheet being then accurately gaged for the next printing action.

According to the invention the sheet is 5 made to travel, after the printing, over a long drying path whereby a perfect drying is ensured.

The invention has further for its object to generally improve the printing press.

Several embodiments of the invention are shown, by .way of example, in the accompanying drawings, in which:

Fig. 1 shows in side elevation the simplest form of construction of a printing press according to the invention.

Fig. 2 is a similar View as Fig. 1 showing the press for first-formand re-printing.

The improved machine comprises several intaglio printing cylinders a arranged the ,one above the other, which co-operate each with a separate impression cylinder 6 and with a separate conveying cylinder 0. The sheet is laid on by the conveying band e on the table d onto the stop and gage device 7,

gripped by the grippers f" of the upper impression cylinder I), conducted around this impression cylinder 6 and then, being released-by the grippers of the impression cylinder, gripped by the grippers c of the conveying cylinder 0.

The sheet gets then onto the conveying band e of the next lower intaglio printing press, which is composed of a copper cylinder a co-operating with the impression cylinder b and of a conveying cylinder 0,. This impression cylinder 6 has its own stop and gage device f, which efiects automatically' correct laying on of the sheet. The grippers f of the second impression cylinder 12, grip the sheet and conduct the same along the copper cylinder a to the conveying fcylinder 0 The sheet is then deposited on the conveying band 6 and brought to the stop and gage device f of a third impressibn cy inder 6 whose grippers f" engage and carry it around. which cylinder 5 co-operates also with a copper cylinder (1 The conveying cylinder 0 conducts the sheet to the delivering band g.

The press shown in Fig. 2, of similar con struction as that shown in Fig. 1 is arranged to serve for first-form and reprinting. The

sheetis laid by the conveying band 0 onto the stop and gage device f of the printing mechanism, a. b and fed by the conveying cylinder 0 by a complete revolution of the same (of sheet reversing type) to a conveying band 71, arranged on the opposite side of the press, by means of the sheet litters i. The sheet is laid onto the stop and gage device k of the ire-printing mechanism Z, m to be printed on the back. The sheet is" then conducted by the conveying cylinder n (0 1: sheet reversing type) to the conveying device e, which has lifters 0', and thence to the stop and gage device 7, ofthe second firstform printing mechanism a 6 The sheetis fed from the conveying cylinder 0 of the mechanisms a 6 by conveying band It having fingers 5,, to the'stop and gage device 70 of the second re-printing mechanisms 1,, m,. In a similar manner the sheet is fed, by means of. a conveying cylinder 01., and the conveying device Z which has fingers 0 to the stop and gage device f, of the first-form printing press a 6 The conveying cylinder c delivers the sheet to the fingers-5 of the conveying device k Laid onto the stop and gage device 70 the sheet passes through the re-printing press 1,, m, to be delivered by the conveying cylinder n. to the delivering device g.

As can be seen from Fig. 2 the sheet passes once around each conveying cylinder. The press might, however, be constructed so that the sheet is fed directly from one printing press to the other. If the sheet is conducted once around each conveying cylinder airdrying methods, known per so, may be employed.

All the impression cylinders are titted, in'

'known manner, with grippers f" which grip the sheet prior to the releasing by the stop and gage devices. 7

It will be understood. of course, that any suitable means for driving the working parts of the press from a source of power may be employed.

I claim 1. A three-color intaglio printing press comprising 'in combination three complete printing presses for successive printing actions on a sheet, conveying cylinders one between each two printing presses. grippers on said conveying cylinders. and a stop for each printing press against which the sheet is-laid and whereby the sheet is gaged for thesucceeding action as soon as it is released by the grippers of the preceding conveying cylinder.

2. A three-color intaglio printing press, comprising in combination three complete printing presses arranged in different horizontal planes, conveying cylinders one between each two printing presses, grippers on said conveying cylinders, and a stop for each printing press against which the sheet is laid and whereby the sheet is gaged for the succeeding action as soon as it is released by the grippers of the preceding conveying cylinder.

3. A three-color intaglio printing press. comprising in combination three complete printing presses arranged in printing-.order in. different horizontal planes, conveying cylinders one between each two printing presses, grippers on said conveying cylinders, and a stop for each printing press against which the sheet is laid and whereby the sheet is gaged for the succeeding action as soon as it is released by the grippers of the preceding conveying cylinder. and a drying path of suitable length between every two printing presses designed to ensure perfeet drying of the printed sheets.

4. A three-color intaglio printing press, comprising in combination three complete printing presses arranged in successive order in different horizontal planes, conveying cylinders one between each two printing presses, grippers on said conveying cylinders. and a stop for each printing press against which the sheet is laid and whereby the sheet is ga-ged for the succeeding action as soon as it is released by the grippers of the preceding conveying cylinder, and a conveyor between each cylinder and the foL lowing printing press for conveying the sheet from thecylinder to the press and pro riding a drying path whereby the sheet after each impression is dried on its travel between successive presses.

5. In av printing press, a series of printlng couples arranged in different horizontal planes successively in printing order on 0pposite sides of the vertical center of the press, conveyors between the printing couples provided with sheet grippers and operative to transfer the sheet from aprinting couple to a succeeding printing couple, and a stop in front of each printing couple operative to arrest the sheet delivered by the preceding conveyor at its momentof release by the grippers of the latter .and to gage the released sheet for said printing couple.

6. In a printing press. a plurality of sets of printing devices for successive actions upon a sheet, transfer devices provided with grippers for engaging and transferring the sheet from each set of printing devices to a succeeding set, and stops for engaging and arresting the sheet at its moment of release by the grippers of the transfer devices. said.

stops operating to gage the sheets for the successive printing actions.

In testimony whereof I' aflix my signature.

(EARL soHUNEMANN. 

